26977969 has 2 divisors, whose sum is σ = 26977970. Its totient is φ = 26977968.

The previous prime is 26977961. The next prime is 26977981. The reversal of 26977969 is 96977962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26471025 + 506944 = 5145^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 26977969 - 2³ = 26977961 is a prime.

It is a super-2 number, since 2×26977969² = 1455621622729922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26977961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13488984 + 13488985.

It is an arithmetic number, because the mean of its divisors is an integer number (13488985).

Almost surely, 2^26977969 is an apocalyptic number.

It is an amenable number.

26977969 is a deficient number, since it is larger than the sum of its proper divisors (1).

26977969 is an equidigital number, since it uses as much as digits as its factorization.

26977969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 55.

The square root of 26977969 is about 5194.0320561198. The cubic root of 26977969 is about 299.9183815005.

The spelling of 26977969 in words is "twenty-six million, nine hundred seventy-seven thousand, nine hundred sixty-nine".